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Top Forums UNIX for Dummies Questions & Answers Merging two files based on two columns to make a third file Post 302517388 by infiniteabyss on Tuesday 26th of April 2011 04:25:52 PM
Old 04-26-2011
Merging two files based on two columns to make a third file

Hi there,

I'm trying to merge two files and make a third file.

However, two of the columns need to match exactly in both files AND I want everything from both files in the output if the two columns match in that row.

First file looks like this:

Code:
chr1    10001980    T    A

Second file looks like this:

Code:
1    chr1    41980    41981    snp    A    G    dbsnp.86:rs806721

I need column 1 and 2 in file 1 to match column 2 and 4 in file 2, respectively.

Any help you can provide is very much appreciated.

I've tried using the join function and awk, but I've failed miserably at both.

Thank you.
Moderator's Comments:
Mod Comment
Please use code tags when posting data and code samples!

Last edited by vgersh99; 04-26-2011 at 06:00 PM.. Reason: code tags, please!
 

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dadadodo(1)                                                   General Commands Manual                                                  dadadodo(1)

NAME
dadadodo - exterminate all rational thought SYNOPSIS
dadadodo [ options ] [ input-files ] DESCRIPTION
dadadodo is a program that analyses texts for Markov chains of word probabilities and then generates random sentences based on those proba- bilities. Sometimes these sentences are nonsense, but sometimes they cut right through to the heart of the matter and reveal hidden mean- ings. OPTIONS
dadadodo accepts the following options: -c, -count n Generate n sentences. -h, -help Show summary of options and exit. -html Output HTML instead of plain text. -l, -load file Load compiled data from file ('-' for standard input). -o, -output file Save compiled data in file ('-' for standard output). -p, -pause s Delay s seconds between paragraphs. -w, -columns columns Format output for a device columns character cells in width. If not specified, the value of the environment variable COLUMNS is used to determine the width. If that variable is not defined, a width of 72 is assumed. NOTES
Non-option arguments are input files. These should be text files, but may be mail folders or HTML. MIME messages are handled sensibly. When no output file is specified, sentences will be generated from the input data directly. However, loading a saved file is far faster than re-parsing the text files each time. ENVIRONMENT
COLUMNS Determines the width (in character cells) of the output if the -w, -columns option is not used. If not set, a width of 72 is assumed. SEE ALSO
dadadodo's upstream website is http://www.jwz.org/dadadodo/. AUTHOR
dadadodo was written by Jamie Zawinski. This manual page was written by Sudhakar Chandrasekharan <thaths@netscape.com>, based on the program's usage message. dadadodo(1)
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